Merge two fs variable declarations into one

Merge branch 'dropdown-aria-roles' of git://github.com/plumlee/bootstrap into plumlee-dropdown-aria-roles

Conflicts:
	js/dropdown.js

Merge branch 'scrollspy-speedy-scroll-top' of git://github.com/ziogaschr/bootstrap into ziogaschr-scrollspy-speedy-scroll-top

Conflicts:
	dist/js/bootstrap.min.js

Scrollspy acting up when targets are hidden

fixed .clearfix example, + doc link

One is enough.

Small fix: I noticed the use of a deprecated variable.

don't create new Tooltip/Popover objects just to destroy them immediately

Clear timeout on destroy.

Add 'collapse' class back after expanding

Only preventDefault on click on [data-toggle="modal"] when the element is a link

Replace UTF-8 characters in s3_cache.py with ASCII characters

Update dependencies

Updates grunt-html-validation and grunt-jekyll dependencies.

Fix wrong indent in .jscs.json

Add docs-assets/css/docs.css to csslint too.

Change david-dm theme to make README badges uniform

Update dependencies.